Safety device for gas-pipes.



P. D. NKAS.

SAFETY DEViCE FOR GAS PIPES.

APPLlcATloN FILED APR.18.1911.

Patented May 21, 1918.

l-Q'. Z1.,

PETER D. NIKAS, 0F WASHINGTON, DISTRICT OF COLUMBIA.

SAFETY DEVICE FOR GAS-PIPES.

i Specification of Letters Patent.

Patented May 21, 1918.

Application iiled April 18, lglf?. ESerial No. 163,011.

To all whom t may concern:

Be it known that I, zPETER D. NIKAs, a subject of the King of Greece, residing at Vashingt-on, in the District of Columbia, have invented certain new `and useful Improvements in Safety Devices for Gas-Pipes, of which the following is a specification.

The object of my invention is to provide a device to cut oif the iiow of gas into a building, when the pressure in the service pipe has been interrupted or ceased to flow therethrough, by reason of frost or water getting into the gas mains.

Vith this object in view, my invention consists in the details of construction and in the arrangements and combination of parts to be hereinafter more fully set-forth and claimed.

In describing my invention in detail reference will be had to the accompanying drawings forming part of the specification wherein like characters denote corresponding parts in the several views.

In the drawing I illustrate my invention as set forth in detail in the following description, and in which Figure 1 is a sectional view.

Fig. 2 a top plan view, and

Fig. 3 a sectional view of the valve.

In the drawing 1 indicates a box or suitable receptacle to protect my improved safety device from being interfered with in any accidental manner, one side of the box being removed. The box is mounted over a pipe 2 which is connected to the house service pipe adjacent to a meter 3. I provide the pipe 2 with a tip 4: on which a rubber bag 5 is suitably secured. A metal box 6 having a pivoted lever 7 connected at one end by a rod S is secured over the pipe and serves to confine the bag in a position so that when it is inflated its force is exerted against the lever 7 raising it in an elevated position as shown in Fig. 1.

I secure a support 9 in the opposite end of the box 2 and adjacent to a valve 10 in the pipe 2. A lever 11 having a weight 12 is connected to the support by the hinge 13. A trigger 14 is pivotally connected to the support at one end and connected to the weighted lever by cables or chains 15. The spring valve 10 comprises a casing 16 having` a cap 17 threaded thereon. A valve 18, provided with a stem 19 which extends above the top of the cap 17 and shoulder 20 is located within the valve casing 16. I secure 'a spiral spring y21 inside of the casing with vone end seated against the shoulder'20 and its opposite end vagainst thetop of the pipe 2. `The spring normallyholds the valve in an open position.

In the operation of my improved safety device, as soon as the service is connected with a building, the gas entering the pipe 2 inflates the bag 5 and raises the lever 7 in an elevated position. The weighted lever is set in a vertical position with the trigger on an angle thereto. The supply of gas from the street main being interrupted by freezing or by water getting into the street main, the pressure in the bag being reduced, the lever 7 descends and in its descent strikes the end of the trigger 14 throwing the weighted lever on the top of the valve stem. The weight being` of sufiicient weight to overcome the resistance of the spring, the valve is closed and remains in that position until the weight is again set in a vertical position.

It is believed that the operation and construction of my invention will be understood from the foregoing description, it being noted that changes may be made in the proportions without departing from the scope of my invention, Y

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a safety device for gas pipes, a receptacle having a cover hinged thereto at one end, mounted on a pipe, said pipe being provided with a tip having a bag adapted to become inflated by the gas entering said pipe, a spring valve located in said pipe, a support mounted on said pipe, a weighted lever mounted on said support, a trigger mounted on said support, flexible connections between said weighted lever and trigger, said trigger being in the path of the hinged cover of the receptacle substantially as described.

2. In a safety device for gas pipes, a box having a lever pivoted at one end, a gas bag confined in said box, means for connecting said gas bag to said pipe, a spring valve located in said pipe, a support mounted over the pipe, a weighted lever connected by a hinge to said support, a trigger pivotally connected to said support extending at an angle to said weighted lever, means or conmeeting said lever and trigger together, and means for throwing said lever on the valve stem as and for the purpose set forth.

3. In a safety device, a pipe having a4 tip held in an open position, a gas bag secured to said tip, a metal boX mounted over said pipe, a lever pivotedat one end to said box and adapted to be held in an elevated position by the gas bag When inflated, a Weighted lever suitably secured over said pipe, a

trigger connected to a support at one end and having a flexible connection With said Weighted lever, said trigger being in the path of the first mentioned lever in its 15 and provided with a spring valve normally. v

descent substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

PETER D. NIKAS. Witnesses: CHARLES CoRooRAs, HARRY F. KENNEDY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of fatents. Washington, D. C. 

